The epic follow-up to 2006's Gerard Butler action pic 300 sees the Persian king-turned-god Xerxes lead an army against Greek forces, who have little training but are under the guidance of a general named Themistokles. (The giant battle at the center of this movie is supposed to occur at the same time as the fighting in 300.)

Green would play a ruthless, gold-covered goddess who persuades Xerxes to amass his army and helps lead them into battle.

The studio is hoping to start production in the first quarter of 2012. Mark Canton, Gianni Nunnari, Bernie Goldman, Zack Snyder, Deborah Snyder and Thomas Tull are producing.

British actress Green may be best known to American audiences for playing James Bond love interest Vesper Lynd in Casino Royale or appearing in the international hit The Golden Compass. She recently wrapped shooting Dark Shadows, Warners’ big-screen take of the gothic soap opera starring Johnny Depp and directed by Tim Burton.